package com.njdj.gps.web.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CheckSessionOutFilter implements Filter {
	
	protected FilterConfig filterConfig = null;
	
	public void destroy() {
		this.filterConfig = null;
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		HttpServletRequest hsrq = (HttpServletRequest) request;
		HttpServletResponse hsrp = (HttpServletResponse) response;
		String userName =null;
		String reqPage = hsrq.getServletPath();
		if (!reqPage.trim().equals("/login.do") && !reqPage.trim().equals("/login_out.do") ) {
			userName = (String) hsrq.getSession().getAttribute("userName");
			if (userName == null) {
				hsrp.sendRedirect("login.do");
				return;
			}
		}
		chain.doFilter(request, response);
	}

	public void init(FilterConfig arg0) throws ServletException {
		this.filterConfig = filterConfig;
	}

}
